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- 单项选择题下面那个代码段正确的增加了一个TextBox控件到一个名为form1的Web窗体上？（）
A、TextBox c = new TextBox(); c.ID = "txtUserName"; c.Visible = true;
B、TextBox c = new TextBox(); c.ID = "txtUserName"; c.Visible = true; c.Controls.Add(form1);
C、TextBox c = new TextBox(); c.ID = "txtUserName"; c.Visible = true; c.Add(form1);
D、TextBox c = new TextBox(); c.ID = "txtUserName"; c.Visible = true; form1.Controls.Add(c);
- D
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